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地震数据中低频成分倾向于反映较厚的岩性地层单元,而高频成分倾向于刻画较薄的等时沉积单元,因此地震分频解释有助于精细沉积层序分析.但目前地震沉积学方法中使用频率滤波方法得到的分频剖面中,地层反射信息不全,不是真正意义上的分频地层反射剖面.为此,本文提出了一种基于时变子波稀疏脉冲反褶积的分频地震层序分析方法,目的是为了得到地层信息较全的真分频地层反射剖面.拟合例子中使用本文提出方法得到的分频地层反射剖面与真实情况相差非常小,验证了本文方法的准确性和有效性.对三角洲前积沉积层序的实例分析,可以清楚得到原始地震剖面中无法显示的细层层序,可用于精细层序分析.
The low-frequency components in the seismic data tend to reflect thick lithologic units, while the high-frequency components tend to characterize thinner isochronal sedimentary units, so the seismic frequency-division interpretation is helpful for the fine sedimentary sequence analysis. However, In the frequency-division profile obtained by the frequency filtering method in this method, the information of formation reflection is not complete and it is not a real sense of the frequency-division stratigraphic reflection profile. Therefore, this paper presents a frequency division based on time-varying wavelet sparse pulse deconvolution The seismic sequence analysis method aims at obtaining the true frequency-divided stratigraphic reflection profile with more complete formation information. The fission reflection cross-section obtained by the proposed method in the fitting example is very small compared with the real situation, which verifies the accuracy of the method Sexual and Validity: An example analysis of the sedimentary sequence of the delta precursor can clearly show the inexplicable fine sequence in the original seismic profile, which can be used for the fine sequence analysis.